---
title: "+=(_:_:)"
framework: spatial
role: symbol
role_heading: Operator
path: "spatial/point3dfloat/+=(_:_:)-83599"
---

# +=(_:_:)

Calculates the element-wise sum of a point’s x, y, and z and a size’s width, height, and depth and stores the result in the left-hand-side variable.

## Declaration

```swift
static func += (lhs: inout Point3DFloat, rhs: Size3DFloat)
```

## Parameters

- `lhs`: The first value.
- `rhs`: The second value.